The most fundamental reality at the present time is that the human species has over shot the capacity of the planet to sustain it. Both in terms of human numbers and in terms of the impact these human beings have on the planet. This is a very challenging situation and the first challenge is really understanding at and accepting it. Because unless we understand the extent to which we’ve already damaged the planet, the extent to which climate change is already irreversible, then whatever we do to cope with environmental issues will have no real long term effect.
– John Grey